|Top-grade||First grade||Qualified product|
|Sodium sulfite(Na2SO3)% ≥||98.0||97.0||
|Free alkali(as Na2SO3),%≤||0.001||0.10||0.40|
Mordant of printing and dyeing; Dechlorinate of textile after bleaching; Sulphonated agent and reducer of chemical industry and pharmacy; Bleach of paper pulp, bamboo and timber bleach of Stap; Treatment agent of waste water; Rubber solidifying agent Perfume industry is served as hydro carbon perfume aldehyde. The hide profession employ to do to molt dose and pliable dose and waterrproof dose; sewage treatment, and so on .
3.RFQ:Q: Are you trading company or manufacturer of ammonium chloride price?
A: We are a trading company with a wide range products,and have good realationship with the factories.
Q: How long is your delivery time?
A: Generally it is 10-15 days, if we have stock. If not, maybe need 15-20 days to arrange the shipping.
Q: What is your terms of payment ?
A: We can do TT and LC payment.
4.Physical appearance:White or light yellow crystal powder, a strong smell of sulfur dioxide, relative density is 1.4, easy to dissolve in water and glycerin, water solution. It has acidity, and its solubility will become large while raising the temperature and is less to dissolve in ethanol.
5.Packaging:Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyers requirement.
6.Company prospectsAt present, our products are well sold in more than 30 countries and regions in Europe, North America and Southeast Asia, and they are highly appraised and welcome by customers for excellent quality.
7.Main Use:√ Pharmaceutical industry for the production of chloroform, benzene, styrene sulfone, formaldehyde.
√ Rubber industry as a coagulant.
√Bleached cotton printing and dyeing industry as the dechlorination agent, cotton scouring agent.
√It can prevent the partial oxidation of cotton cloth fiber and influence the fiber strength.
√ Leather tanning industry for processing,make the leather soft, plump, tough, waterproof, bending,
wear and other properties.
√The chemical industry for the production of vanillin hydroxyl, hydroxylamine hydrochloride and so on.
√ Photographic Industry as a developer, etc.
√Electronics industry for the manufacture of photosensitive resistance.
√Paper-making, Electronic, Water-treatment for electroplating wastewater, drinking water, etc.
8.Production methodThe production route of Sodium Metabisulfite refers to two kinds of , dry and wet.
(1) dry law. When the soda and water are evenly stirred according to a certain molar ratio, when the Na2CO3.nH2O is made to be lumpy, it is put into the reactor with a certain gap between the block and the block and then through into the SO2 until the end of the reaction is finished, the lump is removed and the finished product is crushed.
(2) wet method. In Sodium Bisulfite solution, a certain amount of soda is added to make the suspension of sodium sulfite, then into SO2, that is, the crystallization of sodium pyrosulfite is produced, and the finished product is centrifuged and dried.
9.Storage method:It should be stored in a cool, dry storeroom. Packing and sealing, air oxidation should be prevented. Pay attention to moisture-proof. Rain should be covered with rain and sunlight. It is strictly prohibited to store and mix with acids, oxidants and harmful toxic substances. The product should not be stored for a long time. When loading and unloading, it should be light and light to prevent the packing from breaking. Water and various fire extinguishers can be used when the fire is lost.
10.Precautions for operationClosed operation to strengthen ventilation. Operators must undergo special training and strictly abide by the rules of operation. It is recommended that operators wear self-priming filter respirators, wear chemical safety glasses, wear protective clothing and wear rubber gloves. Avoid producing dust. Avoid contact with oxidants and acids. Light handling and unloading should be carried out to prevent packing and container damage. Equipped with leakage emergency treatment equipment. The empty container may remain harmful.